Zechariah Chapter 13 Bible Study. Zechariah 13:1-9 The Cleansing Fountain. Israel’s cleansing also pictures the cleansing of the whole earth from sin and idolatry. This cleansing will also take place in the great Day of the Lord. The people of Israel are not the only ones to be purged and refined by the Lord. Throughout her history, the church too has gone through many fires of affliction. It is a matter of fact that true believers have suffered in almost every generation on every continent occupied by human beings. Many people in days of Tribulation will turn to the antichrist for their deliverance. Tragically, this will ensure their doom. Rather than being delivered, they will be among the two-thirds who are destroyed, for only those who call on the name of the Lord will be saved.